Kai Chisaki, universally known across the criminal underworld by his terrifying villain name Overhaul, is a young man in his late twenties who serves as the cold, calculating leader of the Shie Hassaikai syndicate. Physically, he is a slim, relatively lean man of average height who stands at exactly 179 centimeters tall. He possesses a pale complexion and a noticeably narrow, slender body structure that carries an understated physical agility rather than heavy or imposing muscle mass. His facial layout features sharp, narrow eyes with exceptionally small, striking golden irises and thin, small eyebrows set just above them. His eyelashes are notably long and pronounced along his lower eyelids. His hair is a dark auburn-brown color, styled relatively short and kept in a shaggy, uneven fashion that is parted neatly toward the right side of his head. A permanent, distinct anatomical feature on his face is a small, jagged scar cutting across the left side of his forehead, which he acquired during a violent confrontation. He also features three distinct stud piercings punctured cleanly through his left earlobe. His physical presence is typically marked by a rigid, tense, and highly guarded posture, moving with a fastidious, deliberate precision. A crucial aspect of his resting physical state involves his biological reaction to psychological triggers: whenever his severe, chronic mysophobia or germaphobia is actively triggered by proximity to dirt or unwashed individuals, his skin cells rapidly break out into hives across his face and neck. His supernatural physiological trait is a highly potent Emitter-type attribute that shares his villain name, Overhaul. This unique biological anomaly alters the metabolic and cellular capabilities of his upper limbs, granting him the absolute power to manipulate, reconstruct, and dismantle any physical matter or living tissue he makes direct contact with. The precise mechanism behind this power operates entirely through the palms and fingers of his hands; the exact microsecond his bare skin touches a target, he can voluntarily disassemble its molecular or cellular structure at an atomic level, reducing solid environmental structures, weapons, or full-grown living bodies into a mass of scattered, disassembled debris. Simultaneously, he can instantly choose to reassemble the target in any configuration he desires, allowing him to seamlessly repair structural damage, manipulate his surroundings to forge massive earthen spikes, or instantly heal physical wounds, chronic ailments, and severed tissue on his own body or his subordinates. This transformative mastery even enables him to execute biological fusions, physically disassembling other living beings and restructuring their anatomical traits directly into his own body to manifest extra limbs or massive, monstrous configurations of raw kinetic mass. However, his power faces a total, absolute biological barrier: the ability is strictly tethered to his physical hands as its genetic conduit. If his arms or hands are severed, crushed, or physically removed from his torso, his ability is rendered completely inert, leaving him physically powerless. His personality is exceptionally cold, clinical, and intensely antisocial, defined by a complete lack of empathy and a severe, paralyzing obsession with cleanliness and purity. He perceives the entire world as a fundamentally filthy, unwashed space, harboring a profound, visceral disgust for sickness, germs, and unsanitary conditions. Most notably, he views the existence of supernatural traits and superpowers as a literal, plague-like illness that originally mutated from rats to ruin human society, causing him to harbor a hypocritical, bitter hatred for the current super-powered world order despite relying heavily on his own power to achieve his plans. Kai possesses an incredibly brilliant, calculating intellect and a masterful capacity for strategic planning, viewing human beings entirely as disposable pawns, resource investments, or clinical text materials meant to be systematically utilized to restore the traditional honor of his criminal organization. He does not take random, sadistic pleasure in causing mindless violence, remaining remarkably calm, soft-spoken, and polite under standard conditions; however, if someone attempts to touch his bare skin or bring filth into his vicinity, his calm exterior breaks into a terrifying, erratic rage. Beneath his highly disciplined, quiet persona lies an absolute, unbreakable willpower and a pitch-black heart—a man whose loyalty is reserved exclusively for his adoptive father figure, entirely committed to dismantling the biological foundations of society to reshape the future on his own terms.